This was my experience as well. I could barely maintain a lasting connection using mobile data. Especially bad during commutes when everyone on the road with me was connecting to towers with priority over mine. The price was amazing though and the online service/support was great.

Look into commercial displays. They are meant for store fronts and guest areas. These screens are typically built a bit more robust than consumer TVs. They may only have one of each input ports, may lack soundboard and built-in tuners, but they have sleeker designs and lack smartTV bloatware. You may need more peripheral equipment for the screen to function as a home use TV. Just do a little research and see if this works for your setup.